Finding the Fourth Proportional to 1,298.93, 1,792.55 and 709.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.93 : 1,792.55 = 709.49 : x
2. Step 2: Convert to fraction form
   1,298.93/1,792.55 = 709.49/x
3. Step 3: Cross multiply
   1,298.93x = 1,792.55 × 709.49
4. Step 4: Simplify right side
   1,298.93x = 1,271,796.30
5. Step 5: Solve for x
   x = 1,271,796.30/1,298.93
6. Step 6: Final answer
   x = 979.11